CN110194383A

CN110194383A - Sheet material conveying, auto document conveying, image reading and image forming apparatus

Info

Publication number: CN110194383A
Application number: CN201910123627.9A
Authority: CN
Inventors: 中村和音
Original assignee: Ricoh Co Ltd
Current assignee: Ricoh Co Ltd
Priority date: 2018-02-27
Filing date: 2019-02-19
Publication date: 2019-09-03
Also published as: JP7085113B2; JP2019147663A

Abstract

The present invention provides a kind of sheet material conveyor, auto document feeder, image read-out and image forming apparatus, after being clamped sheet material come the position in adjustment width direction with 2 groups of clamping transfer units, it is able to suppress inclination of the sheet material relative to conveying direction.Sheet material P conveying and the clamping transfer member moved to the width direction being transversely to the conveying direction can be clipped to the sheet material conveyor 300 of (18 and 45) with 2 groups, it is characterized by: mobile to width direction with the state that clamping transfer member described in 2 groups clips a sheet material P to (18 and 45), and after mobile towards width direction, so that clamping transfer member described in forming 2 groups separates the upstream side clamping transfer member for being located at conveying direction upstream side among (18 and 45) to 45 2 clamping transfer members (45a and 45b), and transfer member is clamped to 18 come feeding sheets P to the downstream side for being located at conveyance direction downstream side among (18 and 45) by 2 groups of clamping transfer members.

Description

Sheet material conveying, auto document conveying, image reading and image forming apparatus

Technical field

It is formed and is filled the present invention relates to a kind of sheet material conveyor, auto document feeder, image read-out and image It sets.

Background technique

Previous known sheet material conveyor has 2 groups of clamping transfer units pair, and the clamping transfer unit is to can clamp Sheet material, and moved in conveying and the width direction orthogonal with conveying direction.

For example, recording in patent document 1, with the first niproll and the second niproll (2 groups of clamping transfer units It is right) clamping recording medium (sheet material) in the state of, move the first niproll and the second niproll in the direction of the width, and to note The position of recording medium in the direction of the width, which is deviateed, to make corrections.

But as described in patent document 1, clamping sheet material is being moved in the direction of the width with 2 groups of clamping transfer units In composition, when deviateing above-mentioned position the conveying of the sheet material after correction, sometimes sheet material can be tilted relative to conveying direction.

No. 6010861 bulletins of [patent document 1] (Japan) patent

Summary of the invention

In order to solve the above problems, technical solution of the present invention provide it is a kind of have 2 groups can clip sheet material conveying and The sheet material conveyor of the clamping transfer member pair mobile to the width direction being transversely to the conveying direction, it is characterised in that: with 2 groups The clamping transfer member is mobile to the width direction to the state of a sheet material is clipped, and towards the width side To after movement, so that the upstream side for being located at the conveying direction upstream side among clamping transfer member pair described in forming 2 groups clamps The clamping transfer member separation of 2 of transfer member pair, and it is described defeated by being located among clamping transfer member pair described in 2 groups The downstream side in direction downstream side is sent to clamp transfer member to conveying the sheet material.

The good effect obtained according to the present invention is to carry out adjustment width to clamping sheet material with 2 groups of clamping transfer units Behind the position in direction, it is able to suppress inclination of the sheet material relative to conveying direction.

Detailed description of the invention

It is to pass through width direction position with the front end of paper before the transfer of present embodiment in delivery section shown in Fig. 1 (a)-(c) Set the explanatory diagram for the movement that the check bit of detection sensor postpones.

It is the schematic configuration diagram of the printer of present embodiment shown in Fig. 2.

Be shown in Fig. 3 present embodiment transfer before delivery section amplification explanatory diagram.

The module of the relationship between the roller pair and sensor and control unit before transferring in delivery section is disposed on shown in Fig. 4 Figure.

It is the explanatory diagram of delivery section before the transfer with reference to configuration example 1 shown in Fig. 5 (a)-(c).

It is in reference configuration example 1, with the mode declaration pattern specification for the state that paper is shifted because aligning roller pair shown in Fig. 6 (a)-(b) Figure.

It is the explanatory diagram of delivery section before the transfer referring to configuration example 2 shown in Fig. 7 (a)-(c).

Be shown in Fig. 8 (a)-(b) in reference configuration example 2, with paper because align roller to and sheet feed section outlet roller pair due to shift State mode declaration pattern specification figure.

Be shown in Fig. 9 present embodiment transfer before delivery section shift motion flow chart.

It is the top view near width position detection sensor shown in Figure 10.

It is to the relaying roller abut/separate shown in Figure 11 (a)-(b) to relaying roller to abutting/separating mechanism explanation Figure.

It is the explanatory diagram of the sheet feed section outlet driving mechanism of embodiment shown in Figure 12 (a)-(b).

It is the explanatory diagram of the sheet feed section outlet driving mechanism of variation shown in Figure 13 (a)-(b).

It is the sheet feed section outlet roller of variation to abutting/separating mechanism explanatory diagram shown in Figure 14 (a)-(b).

It is the summary composition of the duplicator involved in second embodiment with auto document feeder shown in Figure 15 Figure.

It is the summary composition figure of image read-out involved in second embodiment shown in Figure 16.

Specific embodiment

(present embodiment)

Hereinafter, as the image forming apparatus with sheet material conveyor involved in the present invention, to passing through electrofax side Formula is illustrated to form the electrophotographic printer (hereinafter referred to as printer) of image.In the present embodiment, as figure An example as forming device is illustrated to color laser printer, but as image forming apparatus, however it is not limited to colored Device, be also possible to monochromatic device, however it is not limited to printer, be also possible to duplicator or multi-function peripheral etc. other Image forming apparatus.In addition, being not limited to electricity as the image forming apparatus for having sheet material conveyor according to the present invention Sub- photographic means are also possible to the image forming apparatus of the other ways such as ink-jet mode.

It is the summary composition figure of printer involved in embodiment shown in Fig. 2.

Printer 100 is provided with intermediate transfer belt 16 in the substantial middle of printer main body 1.In the upper of intermediate transfer belt 16 Fang Binglie is configured with through the toner of the colors such as yellow (Y), cyan (C), magenta (M) black (K) 4 be imaged Imaging unit 2 (Y, M, C, K).Since 4 imaging units 2 (Y, M, C, K) are other than the color of used toner is different, It constitutes and acts roughly the same, therefore omits indicate that the symbol of color says imaging unit 2 in the following description It is bright.

Imaging unit 2 include it is opposite with the tensioning erection face on the top of intermediate transfer belt 16 and pair latent-image carrier sense Body of light 12, and as the charging unit of charging mechanism 11 around photoreceptor 12, and laser as sub-image formation mechanism are swept Retouch unit 10 and the developing apparatus 13 as developing mechanism etc..Intermediate transfer belt 16 and photoreceptor 12 are clipped in addition, also having It is opposite and pair primary transfer roller 14, and form primary transfer clamping part.

In addition, having secondary transfer roller 15 in the lower section of intermediate transfer belt 16, and clip intermediate transfer belt 16 and secondary turn Print roller 15 it is opposite and pair secondary transfer printing opposed roller 16a, and form secondary transfer printing clamping part.

The lower part of printer main body 1 be provided with from first to third 3 layers of sheet feed stacker 5 paper feed 200. 3 sheet feed stackers 5 of paper feed 200 can pull out respectively relative to printer main body 1, accommodated in each sheet feed stacker 5 by turning The paper P of the compositions such as printing paper or resin film.Paper feed 200 have respectively it is corresponding with 3 layers of sheet feed stacker 5 for paper roller 51, Separate conveying roller 52 and reverse roll 53.

In paper feed 200, separation conveying roller 52 and reverse roll 53 are admitted to by the paper P that sends out for paper roller 51 The separation clamping part of abutment portion.Counter clockwise direction of the separation conveying roller 52 by the driving that is inputted from drive motor in Fig. 2 Upper rotation driving, to the conveying capacity assigned with paper P towards conveyance direction downstream side.

Reverse roll 53 abuts in separation conveying roller 52.Reverse roll 53 is inputted from drive motor and is driven, with inverse in Fig. 2 Driving is rotated on clockwise.

In such a configuration, separating the surface moving direction of conveying roller 52 and reverse roll 53 in separation clamping part is phase Opposite direction, thus just becoming can will be separated with paper P with paper P below and with the uppermost of the paper beam of paper P only to most One above carries out the composition of paper supply with paper P.

In printer 100, carry out input image information from the input terminals such as personal computer or operation panel 3, printing is dynamic Work is when starting, and photoreceptor 12 rotates counterclockwise driving in Fig. 2, and clockwise side of the intermediate transfer belt 16 in Fig. 2 It is driven to rotation.At this moment, the surface of photoreceptor 12 is defined polarity by uniform charged by charging unit 11.Then, equal On the surface of the photoreceptor 12 of even electrification, the laser according to image information is irradiated from the laser scan unit 10 of each color, and Thus electrostatic latent image is formed on photoreceptor 12.Then, the electrostatic latent image being formed on 12 surface of photoreceptor passes through developing apparatus 13 are used as toner image by visual image, and toner image passes through 14 quilt of primary transfer roller at primary transfer clamping part It is transferred on intermediate transfer belt 16.The transfer residual toner on 12 surface of photoreceptor after being attached to toner image transfer passes through Photoreceptor cleaning device removes.

Color image formation when, be above-mentioned image formation is carried out by all imaging units 2 to act, and by This and make the Yellow toner picture being respectively formed on each photoreceptor 12, cyan toner picture, magenta toner picture and black Colour toners picture is transferred to by successively overlapping.On intermediate transfer belt 16.

On the other hand, paper supply is obtained from paper feed 200 with paper P.Input terminal and operation using personal computer etc. Panel 3 selects sheet feed stacker 5 to be used, the use being stored in the sheet feed stacker 5 selected by user from 3 layers of sheet feed stacker 5 Paper P has just obtained paper supply.

The transport path that dotted line expression paper P shown in symbol " 19 " in Fig. 2 passes through in printer 100.

The paper P for obtaining paper supply is sent out towards contraposition roller to 18, is supported and is touched to 18 with the front end of paper P and the contraposition roller of stopping. As shown in Fig. 2, being configured near upstream side of the contraposition roller to 18 to level sensor 21.

It is right as a result, after obtaining integration with the position of the conveying direction of the front end of paper P and the inclination relative to conveying direction Position roller is to 18 just will be sent with paper P towards secondary transfer printing clamping part with the toner image consistent opportunity on intermediate transfer belt 16 Out.The transfer residual toner being attached on 16 surface of intermediate transfer belt in secondary transfer printing clamping part after toner image transfer is logical Intermediate transfer belt cleaning device is crossed to be removed.

Paper P at secondary transfer printing clamping part transferred with unfixing toner picture is transported to fixing device 17, with After being fixed unfixing toner picture on paper P, in the case where being printed on one side, just it is discharged on discharge tray 4.

When two-face printing, the paper P for being formed with image on the first face switches transport path by branch's pawl 40, from And two-sided path is gone by conveying.Reverse roll is passed out to by the pawl 40 that diverges, and positive and negative rotation of the reverse roll to 41 is passed through to 41 paper P And it is conveyed to two-sided roller to 42.At this point, relative to the front and back sides of the conveying direction of paper P and carrying out image formation to the first face When be reversion.Then, when with paper P be transported to relaying roller to 43, contraposition roller to 18 after, pass through work similar to the above Sequence is also implemented on the second surface after image formed, and is discharged on discharge tray 4.

User can connect the paper supply library for capableing of large supply paper P, either by option in printer main body 1 The binder of bookbinding and folding is able to carry out to replace discharge tray 4.

Printer 100 has in paper feed 200 as the conveying with the conveying direction downstream in paper transport path 19 The sheet feed section outlet roller of roller pair is to 45.

It is the amplification explanatory diagram of delivery section 300 before transferring shown in Fig. 3, delivery section 300 forms printing shown in Fig. 2 before the transfer The paper transport path 19 of the conveying direction upstream side with paper P is more leaned on than secondary transfer printing clamping part in machine 100.

Conveyance direction downstream side of the delivery section 300 near contraposition roller is to 18 is equipped with width position detection and passes before transferring Sensor 46, the conveying direction upstream side near sheet feed section outlet roller is to 45 are equipped with rear end detection sensor 47.

Width position detection sensor 46 is to be able to detect whether to reach detection position with paper P and be able to detect that The sensor of the width position of paper P after reaching, rear end detection sensor 47 are to be able to detect with whether the rear end of paper P leads to The sensor of detection position is crossed.

Sheet feed section outlet roller to 45 and contraposition roller to 18 between paper transport path 19 in configured with relay roller to 43.

It is the control unit for indicating to configure roller pair and sensor and printer 100 before transfer in delivery section 300 shown in Fig. 4 The block diagram of relationship between 50.

Relaying roller can connect and separate to 2 rollers for forming roller pair in 43.Printer 100 has defeated to 43 to relaying roller Enter the relaying roller of driving to drive motor 430, and as the power for the movement for separateing 2 roller of the relaying roller to 43 The relaying roller in source is to abutting/separation driving source 431.

Contraposition roller is by using the state of paper P in the width direction orthogonal with the conveying direction with paper P to clip to 18 Movement, come to the shift roller pair shifted with the position of the width direction of paper P.In addition, sheet feed section outlet roller to 45 be with Roller is aligned to 18 together, by clip shifting of the state in the width direction orthogonal with the conveying direction with paper P for using paper P It is dynamic, come keep contraposition roller to 18 shift motion auxiliary shift roller pair.In addition, contraposition roller is to 18 and sheet feed section outlet roller to 45 Middle 2 rollers for forming roller pair can connect and separate.

Printer 100 includes to the contraposition roller of 18 input drivings to contraposition roller to drive motor 180, and as to align Roller connects to 18 2 rollers and the contraposition roller of power source that separately acts is to abutting/separation motor 181.Further, Also have contraposition roller to shifting motor 182 as so that aligning the power for the shift motion that roller moves in the direction of the width to 18 Source.

In addition, printer 100 has to sheet feed section outlet roller to 45 input driving sheet feed section outlet rollers to drive motor 450, and as to sheet feed section outlet roller to 45 2 rollers be contacting and separating movement power source sheet feed section outlet roller pair Abutting/separation motor 451.Further, also there is sheet feed section outlet roller be used as to shifting motor 452 so that sheet feed section exports The power source for the shift motion that roller moves in the direction of the width to 45.

From sheet feed stacker 5 conveying come paper P front end pass sequentially through sheet feed section outlet roller to 45 and relaying roller to 43 after to Up to contraposition roller to 18.The adjustment that contraposition roller carries out conveying opportunity to 18, and restarting towards the defeated of secondary transfer printing clamping part When sending, with paper P by width position detection sensor 46 come the position of the end of detection width direction (main scanning direction), And the correction amount of the width direction with paper P is calculated by control unit 50.Thus, it will be able to calculate dynamic according to displacement will be carried out The correction amount of the position of paper P before work, so as to the suitably correction position of paper P.

When user will be placed into sheet feed stacker 5 with paper P, the position deviation that is easy to happen in the width direction with paper P. As the composition for the position deviation for inhibiting width direction, it is that side baffle is set in sheet feed stacker 5, is accurately configured in user Side baffle and relative to side baffle come under the premise of accurately placing with paper P, to guarantee picture quality.

As the printer 100 of present embodiment, maked corrections if it is shift motion is carried out with the width direction of paper P The composition of position deviation, it will be able to mitigate the placement placement precision for the paper P that user is required when paper P in sheet feed stacker 5.

Be shown in Fig. 1 before the transfer of present embodiment in delivery section 300 delivery ratio sheet feed section outlet roller to 45 to contraposition In the case where roller use paper P longer to the distance of 18 paper transport path 19, width position is passed through with the front end of paper P Explanatory diagram after the detection position of detection sensor 46.

It is saying of postponing of the check bit for just having passed through width position detection sensor 46 with the front end of paper P shown in Fig. 1 (a) Bright figure.

When passing through the detection position of width position detection sensor 46 with the front end of paper P, roller is relayed by driving To abutting/separation driving source 431, makes to relay outer side roller 43b and be moved on direction arrow " A1 " in Fig. 1 (b), come so that relaying Inner roller 43a is separated with outer side roller 43b is relayed.As a result, when carrying out shift motion to 18 using contraposition roller, it can prevent from being located at Align obstruction of the roller to the relaying roller of 18 upstreams to 43 pairs of displacements with paper P.

After inner roller 43a will be relayed and relay outer side roller 43b separately, control unit 50 just drives contraposition roller to shifting motor 182 and sheet feed section outlet roller to shifting motor 452, to make to align roller to 18 and sheet feed section outlet roller to 45 synchronizing movings.At this point, It is that will align roller to clip state with paper P to 45 to 18 and sheet feed section outlet roller by contraposition roller and 18 and sheet feed section are gone out Mouth roller carries out shift motion after moving to 45 towards width direction.

In the present embodiment, so that only moving the correction of the width direction of paper P calculated in width direction with paper P When terminating shift motion after the amount of amount, just drive sheet feed section outlet roller to abutting/separation motor 451.As a result, such as Fig. 1 (c) institute Show, so that sheet feed section exports outer side roller 45b in the direction (arrow " A2 " in Fig. 1 (c) for leaving sheet feed section outlet inner roller 45a Direction) on move, come so that sheet feed section outlet inner roller 45a and sheet feed section to export outer side roller 45b separated.

In this way, in the present embodiment, after shift motion, as making sheet feed section outlet roller shown in Fig. 1 (c) It separates to 45, is only conveyed to 18 by aligning roller with paper P.Sheet feed section outlet roller just drives sheet feed section outlet roller after opening 45 points To shifting motor 452, come so that sheet feed section outlet roller returns to before above-mentioned shift motion the position of 45 width direction The initial position of position.When position of the sheet feed section outlet roller to 45 width direction becomes initial position and is led to the rear end of paper P Cross sheet feed section outlet roller to 45 position when, just drive sheet feed section outlet roller to abutting/separation motor 451 comes so that sheet feed section goes out Mouth roller contacts 45 2 rollers.

After only starting conveying paper P to 18 by contraposition roller, when being clamped in secondary transfer printing clamping part with paper P, With regard to driving contraposition roller to abutting/separation motor 181.Make to align upper roller 18a as a result, to the direction movement for leaving contraposition lower roll 18b To separate contraposition upper roller 1618a and contraposition lower roll 18b, and the surface moving body by forming secondary transfer printing clamping part (16,15) To convey with paper P.Contraposition roller just drives contraposition roller to shifting motor 182 after opening 18 points, comes so that aligning roller to 18 width The position in direction returns to the initial position of the position before above-mentioned shift motion.When contraposition roller to 18 width direction position Become initial position and with the rear end of paper P by contraposition roller to 18 position when, just driving contraposition roller to contact/separation motor 181 come so that 2 rollers for aligning roller to 18 contact.

In addition, when with the rear end of paper P by relaying roller to 43 position when, just driving relaying roller drives contact/separation Source 431 is come so that 2 rollers for relaying roller to 43 contact.

Initial position is returned to 45 by sheet feed section outlet roller, and 2 rollers are the state of contact, even if previous use The rear end of paper P also can receive the next paper supply with paper P before by relaying roller to 43 or position of the contraposition roller to 18.

Here, the printer 100 of present embodiment with sheet feed section outlet roller to 45 control be different reference configuration examples, Come to delivery ratio sheet feed section outlet roller to 45 to contraposition roller to 18 paper transport path 19 apart from the longer P with paper when each portion Movement be illustrated.

(referring to configuration example 1)

Be shown in Fig. 5 first with reference to configuration example (with reference to configuration example 1) transfer before delivery section 300 explanatory diagram.In addition, figure It is to use paper P to contraposition roller is longer to the distance of 18 paper transport path 19 to 45 in delivery ratio sheet feed section outlet roller shown in 5 In the case where, pass through each roller after the detection position of width position detection sensor 46 with the front end of paper P to moving Explain figure.

The function for not having sheet feed section outlet roller not shift shifting motor 452, sheet feed section outlet roller to 45 with reference to configuration example 1 Energy.

With reference in configuration example 1, and the adjustment that contraposition roller carries out conveying opportunity to 18, and restarting towards secondary turn Print clamping part conveying when, with paper P by width position detection sensor 46 come detection width direction (main scanning direction) End position.Then, the correction amount of the width direction with paper P is calculated by control unit 50.

It is saying of postponing of the check bit for just having passed through width position detection sensor 46 with the front end of paper P shown in Fig. 5 (a) Bright figure.In reference configuration example 1, when passing through the detection position of width position detection sensor 46 with the front end of paper P, just Driving relaying roller is to abutting/separation driving source 431 and sheet feed section outlet roller to abutting/separation motor 451.Roller is relayed by driving To abutting/separation driving source 431, makes to relay outer side roller 43b and be moved on direction arrow " A1 " in Fig. 5 (b), come so that relaying Inner roller 43a is separated with outer side roller 43b is relayed.In addition, making to supply to abutting/separation motor 451 by driving sheet feed section outlet roller Paper portion exports outer side roller 45b and moves on direction arrow " A2 " in Fig. 5 (b), comes so that sheet feed section outlet inner roller 45a and confession Paper portion exports outer side roller 45b separation.

After relaying roller separates 43 and sheet feed section outlet roller to 45, contraposition roller is only moved into institute to 18 in the direction of the width The correction amount of calculating, and the position of the width direction with paper P is integrated, complete the correction of the transfer position with paper P.Roller is relayed to 43 It is only as shown in Fig. 5 (c) until being secondary transferred clamping part clamping with paper P and after sheet feed section outlet roller opens 45 points It is conveyed to 18 by aligning roller with paper P's.

Later, when being clamped in secondary transfer printing clamping part with paper P, just driving contraposition roller is to abutting/separation motor 181.Make to align upper roller 18a to the direction movement for leaving contraposition lower roll 18b as a result, to separate under contraposition upper roller 1618a and contraposition Roller 18b, and the surface moving body by forming secondary transfer printing clamping part (16,15) is conveyed with paper P.After contraposition roller opens 18 points With regard to driving contraposition roller to shifting motor 182, to return to above-mentioned shift motion to the position of 18 width direction so that aligning roller The initial position of position before.When contraposition roller becomes initial position to the position of 18 width direction and is led to the rear end of paper P Cross contraposition roller to 18 position when, just driving contraposition roller contact/separation motor 181 is come so that 2 rollers for aligning roller to 18 connect Touching.Initial position is returned to 18 by contraposition roller, and 2 rollers are the state of contact, so that it may receive next with paper P's Paper supply.

With reference in configuration example 1, carry out contraposition roller to 18 shift motion when, when being shifted the rear end with paper P than relaying Roller to 43 position upstream side in the case where, just carry out following control.That is, by than contraposition roller to 18 more The roller pair of upstream, when carrying out shift motion when with the rear end of paper P not over the position of the roller pair in the case where, come so that Form 2 rollers separation of roller pair.That is, using the rear end of paper P than relaying roller to 43 position when being shifted in shift motion In the case where setting upstream side, 2 rollers for allowing for relaying roller to 43 are separated.In addition, using paper P when being shifted in displacement Rear end be located at than relaying roller to the paper feed portion outlet rollers of 43 upstreams to 45 upstream side when, sheet feed section outlet roller is to 45 2 rollers also separate.

Before the transfer of reference configuration example 1 in delivery section 300, move in the direction of the width so that aligning roller to 18 Shift motion stage, regardless of the length for using paper P, holding is with the roller of paper P to only contraposition roller to 18.

It is in reference configuration example 1, by as the paper transport path 19 for forming the preceding delivery section 300 of transfer shown in Fig. 6 Conveyance guide part 55 is come the paper P that guides by aligning state that roller is shifted to 18 before the transfer of transport path forming member Mode declaration pattern specification figure.Arrow " B " in Fig. 6 indicates to use the conveying direction of paper P.

When carrying out shift motion, roller is aligned to 18 in the conveying capacity to the direction arrow " B " assigned in Fig. 6 with paper P Meanwhile it being moved in the direction of the width as shown in the arrow " S " in Fig. 6 (a).As a result, as shown in the arrow " F1 " in Fig. 6, phase For with paper P, work to 18 the power moved in the direction of the width with contraposition roller.On the other hand, due to defeated before being transferred The paper P for sending guide portion 55 to guide is contacted with preceding conveyance guide part 55 is transferred, when to be moved in the direction of the width with paper P, just It can be acted between conveyance guide part 55 before transfer just like frictional force shown in the arrow " F2 " in Fig. 6 at it.

Contraposition roller only acts upon the power of 18 direction of displacement near the front end with the conveying direction of paper P, preceding defeated with transfer Conveyance guide part 55 contacts before sending the frictional force between guide portion 55 to act on the conveying direction whole region with paper P and transfer In part.Therefore, there will be rotating torques shown in the arrow " M " in Fig. 6 (a) with effect on paper P, when shift motion is completed When, it is just shown as shown in Figure 6 to be possible to generating deflection on paper P.

Due to being maked corrections with the deflection of paper P when being supported with the front end of paper P and encountering contraposition roller to 18, and aligned with paper P The deflection that roller generates when conveying to 18 clampings cannot make corrections, so being just transported in the state of glancing off with paper P Secondary transfer printing clamping part.When toner image is transferred on the paper P of deflection by secondary transfer printing clamping part, it is possible to produce Raw image is relative to bad for inclined image with paper P.

(referring to configuration example 2)

Then, the second reference configuration example (with reference to configuration example 2) for being able to suppress deflection generation by shift motion is carried out Explanation.2.

Be shown in Fig. 7 with reference to configuration example 2 transfer before delivery section 300 explanatory diagram.In addition, being in delivery ratio shown in Fig. 7 Sheet feed section outlet roller is longer to the distance of 18 paper transport path 19 in the case where paper P to contraposition roller to 45, with paper P's Front end has passed through the explanatory diagram of the movement of each roller after the detection position of width position detection sensor 46.

With reference to configuration example 2 from reference to including sheet feed section outlet roller unlike configuration example 1 to shifting motor 452, as Shift roller pair and be located at contraposition roller to 18 upstream sheet feed section outlet roller to 45 have the function of auxiliary shift roller pair.Sheet feed section Outlet roller is used as to 45 assists the composition of shift roller pair identical as delivery section 300 before the transfer of above embodiment.But it refers to Delivery section 300 before the transfer of configuration example 2 and embodiment the difference is that, after shift motion is completed, still through confession Paper portion outlet roller conveys to 18 with paper P 45 and contraposition roller.

It is saying of postponing of the check bit for just having passed through width position detection sensor 46 with the front end of paper P shown in Fig. 7 (a) Bright figure.

When passing through the detection position of width position detection sensor 46 with the front end of paper P, roller is relayed by driving To abutting/separation driving source 431, makes to relay outer side roller 43b and be moved on direction arrow " A1 " in Fig. 7 (b), come so that relaying Inner roller 43a is separated with outer side roller 43b is relayed.As a result, when carrying out shift motion to 18 using contraposition roller, it can prevent from being located at Align obstruction of the roller to the relaying roller of 18 upstreams to 43 pairs of displacements with paper P.

After inner roller 43a will be relayed and relay outer side roller 43b separately, control unit 50 just drives contraposition roller to shifting motor 182 and sheet feed section outlet roller to shifting motor 452, to make to align roller to 18 and sheet feed section outlet roller to 45 synchronizing movings.

It is constituted in example 2 in reference, so that only moving the width direction of paper P calculated in width direction with paper P It is just shown as shown in Fig. 7 at the end of the shift motion of the amount of correction amount, 18 and sheet feed section outlet roller are clamped to 45 in contraposition roller With the conveying carried out in the state of paper P with paper P.

Before the transfer of reference configuration example 2 in delivery section 300, move in the direction of the width so that aligning roller to 18 Shift motion stage, when with paper P longer, the roller of holding paper P to be contraposition roller to 18 and sheet feed section outlet roller to 45 2 groups of rollers pair.

It is in reference configuration example 2, by as the paper transport path 19 for forming the preceding delivery section 300 of transfer shown in Fig. 8 Conveyance guide part 55 passes through contraposition roller to 18 and sheet feed section outlet roller come the paper P guided before the transfer of transport path forming member The mode declaration pattern specification figure for the state being shifted to 45.Identical as Fig. 6, the arrow " B " in Fig. 8 indicates to use the conveying direction of paper P.

When carrying out shift motion, roller is aligned to 18 in the conveying capacity to the direction arrow " B " assigned in Fig. 8 with paper P Meanwhile it being moved in the direction of the width as shown in the arrow " S1 " in Fig. 8 (a).As a result, as shown in the arrow " F1 " in Fig. 8, phase For with paper P, work to 18 the power moved in the direction of the width with contraposition roller.In addition, sheet feed section outlet roller to 45 While to conveying capacity on the direction arrow " B " assigned with paper P in Fig. 8, also as shown in the arrow " S2 " in Fig. 8 (a) It is moved in width direction.As a result, as shown in the arrow " F3 " in Fig. 8, in the direction of the width with sheet feed section outlet roller to 45 together The power being moved in the width direction is acted on on paper P.

On the other hand, since the paper P that conveyance guide part 55 guides before being transferred is contacted with preceding conveyance guide part 55 is transferred, It, can be in itself and conveyance guide part 55 before transfer just in the same manner as reference configuration example 1 when to be moved in the direction of the width with paper P Between effect just like frictional force shown in the arrow " F2 " in Fig. 8.

In reference configuration example 2, in the same manner as the frictional force and reference configuration example 1 transferred between preceding conveyance guide part 55, In the part that conveyance guide part 55 contacts before acting on the conveying direction whole region with paper P and transferring.But displacement paper P Direction power it is different from reference to configuration example 1, by aligning roller to 18 and sheet feed section outlet roller to 45, act on defeated with paper P Send the front end in direction nearby and near rear end.Therefore, rotating torques are able to suppress to the effect with paper P, and are able to suppress displacement The generation of deflection caused by acting.

But before the transfer of reference configuration example 2 in delivery section 300, by contraposition roller to 18 and sheet feed section outlet roller pair 45 shift using paper P and adjust the position with paper P in the direction of the width, after end-of-shift, then to 18 and are supplied by contraposition roller Paper portion outlet roller is conveyed to 45 with paper P.

Generally, the roller of the conveying sheet materials such as paper P is to meeting because part error and assembly error etc., the rotary shaft of roller is opposite In conveying direction generate inclination, or formed roller pair 2 rollers abutting pressure generates in the axial direction variation unevenness.They make The deflection ingredient having has an impact the sheet material passed through for each roller.

Then, in reference configuration example 2, after end-of-shift, by then passing through contraposition roller to 18 and sheet feed section outlet roller pair 45 convey with paper P, thus it is transported with paper P just by 2 groups of rollers on deflection ingredient influenced, sometimes with paper P relative to The inclination of conveying direction will become larger.

In the present embodiment, delivery ratio sheet feed section outlet roller to 45 to contraposition roller to 18 paper transport path 19 away from In the case where from shorter paper P, shift contraposition roller in the direction of the width to 18.On the other hand, in delivery ratio sheet feed section Outlet roller to 45 to contraposition roller to 18 paper transport path 19 apart from longer in the case where paper P, being by contraposition roller pair 18 and sheet feed section outlet roller clamped to 45 with paper P, make this 2 groups of rollers to moving in the direction of the width and carry out shift motion.

18 and sheet feed section outlet roller are clipped to 45 with paper P by then passing through contraposition roller and shifted, just said with referring to Fig. 8 Bright reference configuration example 2 similarly, is able to suppress rotating torques to the effect with paper P, and be able to suppress caused by shift motion The generation of deflection.

Further, contraposition roller to 18 and sheet feed section outlet roller to 45 shift motion after, sheet feed section outlet roller It is separated from each other roller to 45, and is only conveyed to 18 by aligning roller with paper P.At this point, being gone out with the rear end of paper P by sheet feed section Before mouthful roller is to position of 45 clampings with paper P, so that sheet feed section outlet roller separates 45 2 rollers.It is just able to suppress use as a result, Paper P influences deflection ingredient possessed by 45 by sheet feed section outlet roller (using paper P relative to the inclined power of conveying direction). Therefore, it will be able to the problem of inhibition paper P becomes larger relative to the inclination of conveying direction, so as to realize the conveying essence for using paper P The raising of degree.

In addition, can be improved and toner image is transferred to the secondary transfer printing clamping part on paper P by improving delivery precision The position precision of the paper P at place, and it is able to suppress position deviation when image is transferred to on paper P, so as to improve shape The precision of images of image on Cheng Yong paper P.

By with paper P and contraposition roller to 18 support touch come the deflection that makes corrections.But by contraposition roller to after 18, because being 18 and sheet feed section outlet roller are conveyed to 45 by aligning roller, so just will receive these rollers to possessed deflection ingredient Influence.

As the method to make corrections to the influence by contraposition roller to the deflection after 18, there is the following method.That is, It is imaged with the test pattern of the influence on paper P to detection deflection, and reads the test pattern, then root by reading mechanism It is formed corresponding to deflection and inclined correction image according to read image information.

When forming such correction image by reference to the composition of configuration example 2, can there is a problem of following.That is, joining It examines in configuration example 2, due to after shift motion with the inclined deflection ingredient of paper P to be to align roller to 18 deflection ingredient and paper supply Portion's outlet roller therefore is just difficult to be patterned the influence of deflection to 45 multiple deflection ingredient such as deflection ingredient.Therefore, It is just difficult to be formed and correspond to the deflection of paper P come inclined correction image, it is possible to making image relative to the inclination with paper P It is deteriorated.

In contrast, being moved in the printer 100 of the present embodiment only conveyed by contraposition roller to 18 after shift motion Only to be aligned roller after the movement of position with the inclined deflection ingredient of paper P to deflection ingredient possessed by 18.Therefore, it is easy for inclined Oblique influence is patterned, and corresponding to deflection, inclined correction image is easy for being imaged, so as to realize image quality Raising.

Be shown in Fig. 9 present embodiment transfer before delivery section 300 shift motion flow chart.

When the front end of the paper P come from 5 paper supply of sheet feed stacker is by detection position to level sensor 21, to level sensor 21 become " starting ON " (step S1).Should " starting ON " later, with supported with the front end of paper P encounter contraposition roller to 18 opportunity come it is temporary The conveying of paper P is deactivated, and whether the length of detection paper P is to reach sheet feed section outlet roller to 45 length (step S2).At this In embodiment, when rear end detection sensor 47 stopped detected with the opportunity of the conveying of paper P with paper P when, be judged as Front end reach contraposition roller to 18 when paper P length be reach sheet feed section outlet roller to 45 length (in step s 2 for " It is ").

As the judgement of the length with paper P, it is not limited to according to configuration in the detection with the sensor in paper transport path 19 As a result come detect conveying in paper P length composition.It can also be according to being arranged in the sheet feed stacker 5 for carrying out paper supply with paper P In paper P dimension information, or the dimension information of the paper P conveyed from inputs such as operation panels 3 judges with paper P Length.

For example, the printer 100 with multiple sheet feed stackers 5 is generally to put according to the size of paper P and direction to divide Set the sheet feed stacker 5 for using paper P.Then, the dimension information of the length direction for the paper P being placed in each sheet feed stacker 5 is saved In the storage unit of control unit 50.Therefore, by being placed on from storage unit taking-up in the sheet feed stacker 5 for carrying out paper supply with paper P Paper P length direction dimension information, it will be able to judge front end reach contraposition roller to 18 when paper P length whether be Sheet feed section outlet roller is reached to 45 length.

When with the length of paper P be reach sheet feed section outlet roller to 45 length when (step S2 be " being "), just to sheet feed section Outlet roller carries out rotation driving to 18 to 43 and contraposition roller to 45, relaying roller.Then, when width position detection sensor 46 when detecting with paper P, allows for relaying roller and opens (step S3) 43 points, and stops driving 43 rotation on relaying roller.In After roller opens 43 points, in the state of continuing to drive 45 rotations 18 and sheet feed section outlet roller on contraposition roller, pass through contraposition Roller carries out shift motion (step S4) to 45 to 18 and sheet feed section outlet roller.After shift motion, so that sheet feed section exports Roller is to 45 separation (step S5), during contraposition roller continues rotation driving to 18 to convey with paper P, by sheet feed section outlet roller Initial position (step S6) is returned to the position of 45 width direction.Later, 47 pairs of rear end detection sensor rear ends with paper P By being detected (step S7), and after stipulated time (being in the present embodiment several millimeters) sheet feed section is exported Roller abuts (step S8) to 45, goes to receive next with paper P (step S9).

When be not with the length of paper P reach sheet feed section outlet roller to 45 length when (step S2 be " no "), just to relaying Roller carries out rotation driving to 18 to 43 and contraposition roller, and when width position detection sensor 46 is detected with paper P So that relaying roller opens (step S10) to 43 points.Then, shift motion (step S11) only is carried out to 18 by aligning roller, and connect One is accepted with paper P (step S9).

When the paper P of conveying is shorter, by only carrying out shift motion to 18 by contraposition roller, sheet feed section outlet roller is to 45 Become 2 rollers in initial position and contact constant state, receives next with the time until paper P so as to shorten.Therefore, The movement of next paper supply would not be delayed, so as to keep productivity.

Before the transfer of reference configuration example 2 in delivery section 300, contraposition roller shifts 18 and sheet feed section outlet roller to 45 After movement, be with the rear end of paper P by sheet feed section outlet roller to 45 after, come carry out by sheet feed section outlet roller to 45 width The position in direction returns to the movement of initial position.

In contrast, being in contraposition roller to 18 and sheet feed section outlet roller before the transfer of present embodiment in delivery section 300 After having carried out shift motion to 45, no matter with the position of paper P how, all open sheet feed section outlet roller to 45 points.Cause This, before with the rear end of paper P by the position clamped by sheet feed section outlet roller to 45, it will be able to start sheet feed section outlet roller The movement of initial position is returned to the position of 45 width direction.

In addition, the sheet feed section outlet roller for returning to initial position after separating is detected from the paper P in conveying by rear end to 45 The detection position of sensor 47 starts, and after stipulated time (and millisecond), is carrying out the control so that the contact of 2 rollers.

In this way, delivery section 300 can be than delivery section 300 before the transfer of reference configuration example 2 before the transfer of present embodiment Start the movement that position of the sheet feed section outlet roller to 45 width direction is returned to initial position earlier.Thus, it will be able to contract It is as short as receiving next with the time until paper P, so as to reduce the distance between paper.Not for the movement of next paper supply It can delay, so as to keep productivity.

It is the width position detection sensor illustrated to being detected with the position of the width direction of paper P shown in Figure 10 Top view near 46 width position detection sensor 46.Width position detection sensor 46, which is arranged on, uses paper Just by contraposition roller in the position after 18 in transport path 19.Width position detection sensor 46 is in width direction It is set side by side in (up and down direction in Figure 10) and to be made of multiple light receiving elements such as the light-emitting components such as LED and photodiodes The sensor of photoelectric sensor.Then, it is examined by detecting as with the position of the paper end PE of the width direction end of paper P Survey the positional offset amount of the lateral position with paper P.That is, width position detection sensor 46 is detection delivery section before transfer The positional offset amount of the paper P conveyed on 300 paper transport path 19 in the direction of the width.Therefore, according to width direction position The testing result for setting detection sensor 46 carries out transverse direction position benefit to 45 to 18 and sheet feed section outlet roller by aligning roller Positive (or only carrying out the correction of transverse direction position to 18 by aligning roller).

In the present embodiment, composition as shown in Figure 10 is only to examine in width direction one end setting width position Sensor 46 is surveyed with the position of the paper end PE of the detection width direction one end of paper P, but can also be complete in width direction Width position detection sensor 46 is set in region.In this case, it will be able to the detection width direction of paper P respectively The position of the paper end PE at both ends.In addition, as width position detection sensor 46, as long as being able to detect with paper P's The position of width direction is just not limited to composition shown in Fig. 10.

It is relaying roller that relaying roller is abutted and separated to 43 shown in Figure 11 to the explanation of abutting/separating mechanism 30 Figure.It is to relay roller to the perspective illustration of contact/separating mechanism 30 shown in Figure 11 (a), is cross sectional illustration figure shown in Figure 11 (b).

Relaying inner roller 43a is driven roller, by being transmitted in relaying drive shaft 38 from relaying roller to drive motor 430 Rotation driving is to carry out rotation driving.

Relaying outer side roller 43b is driven voller, is fixed with the driven rotary shaft 36 of relaying for relaying outer side roller 43b in relaying sliding It is supported to be freely rotated on parts of bearings 39.Relay framework of the plain bearing element 39 relative to 100 main body of printer Being assembled into can only slide on the moving direction for relaying outer side roller 43b.Relaying force application spring 37 is that will relay sliding bearing Compressed spring of the component 39 towards relaying inner roller 43a force.

In relaying roller in abutting/separating mechanism 30, when driving relaying roller is to abutting/separation driving source 431, relaying is supported Connect/separate right direction of the biasing member 32 into Figure 11 (a) it is prominent after push separating force input lever 33.33 quilt of separating force input lever It is fixed in relaying declutcher control lever rotation axis 34, relaying declutcher control lever 35 is fixed on the axis.When separating force input lever 33 is supported by relaying When connecing/separate the pushing of biasing member 32, separating force input lever 33 is rotary shaft in Figure 11 to relay declutcher control lever rotation axis 34 It is rotated on the direction arrow " D ".At this point, the relaying declutcher control lever 35 being fixed in relaying declutcher control lever rotation axis 34 is also defeated with separating force Enter bar 33 and only rotates rotation amount identical with separating force input lever 33 together.

In Figure 11 (b), for convenience, the separating force input lever for being more located at front side than illustrated section is represented by dashed line 33。

As shown in figure 11, relaying declutcher control lever 35 has bending section in front end side, and formation relaying is driven in the bending section The shape of 36 hooking of rotary shaft.When relaying declutcher control lever 35 rotates on direction arrow " D " in Figure 11, effect is had and will be relayed The power that driven rotary shaft 36 above pushes away, relay outer side roller 43b just with the applied force that relays force application spring 37 it is mutually anti-in Figure 11 (b) The direction arrow " E " on move, and from relaying inner roller 43a leave.

While followed by being driven to sheet feed section outlet roller to 45 rotations, is shifted and isolated sheet feed section outlet drives The explanatory diagram of mechanism 600.

It is the explanatory diagram of sheet feed section outlet driving mechanism 600 shown in Figure 12.It is sheet feed section outlet roller to 45 shown in Figure 12 (a) Sheet feed section outlet inner roller 45a and sheet feed section export the state of outer side roller 45b contact, be that sheet feed section exports shown in Figure 12 (b) Inner roller 45a and sheet feed section export the state of outer side roller 45b separation.

Sheet feed section outlet driving mechanism 600 has can be in width direction (in Fig. 2 relative to 100 main body of printer The orthogonal direction of paper) on the shift unit 60 that slides.Shift unit 60 is bearing sheet feed section outlet inner roller 45a and sheet feed section Outer side roller 45b, sheet feed section outlet roller are exported to abutting/separation motor 451 and sheet feed section outlet roller to drive motor 450, and The composition integrally slided relative to 100 main body of printer.In addition, the tooth of driving when shift unit 60 includes input displacement Gear part 69.

When configuration is when the sheet feed section outlet roller of 100 main body side of printer drives shifting motor 452, displacement driving is defeated Gear 68 just rotates on the direction of the arrow in Figure 12 (a) " G " out.It is just engaged as a result, with displacement driving output gear 68 Rack tooth wheel portion 69 in have input the driving moved in the direction of the width, shift unit 60 is just in width direction (in Figure 12 (a) The direction arrow " H ") on move.

Sheet feed section exports inner roller 45a and is supported to that inside can be exported with sheet feed section relative to the framework of shift unit 60 It rotates centered on roll shaft 64, the driving by sheet feed section outlet roller to drive motor 450, is rotated in conveying on the direction of paper P Driving.

The outer side roller 45b in sheet feed section outlet is supported to export with sheet feed section outer relative to abutting/separation maintaining part 61 It is rotated centered on side roller axis 63.Abutting/separation maintaining part 61 passes through the guiding mechanism being arranged in the framework of shift unit 60, phase The framework of shift unit 60 is maintained as to be contacting and separating direction (Figure 12 making sheet feed section export outer side roller 45b In up and down direction) on slide.

Shift unit 60 includes to support to touch with the framework of shift unit 60 and abutting/separate maintaining part 61, and will abut/point Abutting/separation the compressed spring 62 to exert a force from maintaining part 61 towards sheet feed section outlet inner roller 45a.In abutting/separation maintaining part In the 61 inner states for not acting on other external force, abutting/separation maintaining part 61 passes through abutting/separation compressed spring 62 applied force It is exerted a force towards sheet feed section outlet inner roller 45a.The confession that thereby, it is possible to rotatably be supported in abutting/separation maintaining part 61 Paper portion exports outer side roller 45b and just abuts with sheet feed section outlet inner roller 45a.Outer side roller 45b and sheet feed section are exported in sheet feed section In the state of exporting inner roller 45a abutting, pass through the rotation driving that sheet feed section exports inner roller 45a, sheet feed section exports outer side roller 45b makees driven rotation.

Shift unit 60 includes that abutting/separation maintaining part 61 supports the abutting/detaching cam 65 touched.Abutting/detaching cam 65 It is fixed in abutting/detaching cam rotary shaft 66, by sheet feed section outlet roller to the driving of abutting/separation motor 451, when supporting Connect/detaching cam rotary shaft 66 is when rotating, abutting/detaching cam 65 also with abut/detaching cam rotary shaft 66 rotates together.

When driving sheet feed section outlet roller from state shown in Figure 12 (a) to abutting/separation motor 451, abutting/detaching cam Rotary shaft 66 and abutting/detaching cam 65 rotate on direction arrow " I " in Figure 12 (a), and abut/detaching cam 65 exists Arrow " J " in Figure 12 (a) just presses upwards on abutting/separation maintaining part 61.The abutting pushed by abutting/detaching cam 65/point Mutually anti-ly from maintaining part 61 and the applied force for abutting/separating compressed spring 62 in the direction for leaving sheet feed section outlet inner roller 45a Upper movement.The sheet feed section supported as a result, by abutting/separation maintaining part 61 exports outer side roller 45b and sheet feed section exports inner roller 45a It separates and becomes state shown in Figure 12 (b).

As described above, shift unit 60 be bearing sheet feed section outlet inner roller 45a and sheet feed section export outer side roller 45b, Sheet feed section outlet roller to abutting/separation motor 451 and sheet feed section outlet roller to drive motor 450, and integrally relative to beating 100 main body of print machine is come the composition slided.In addition, sheet feed section outlet roller is to abutting/separation motor 451, sheet feed section outlet roller to drive Dynamic motor 450 and sheet feed section outlet roller can independently carry out drive control to shifting motor 452.

It is made up of these, it will be able to export inner roller 45a in sheet feed section and sheet feed section exports the shape of outer side roller 45b separation Shift motion is carried out under state.

In addition, passing through above-mentioned composition, additionally it is possible to export inner roller 45a in sheet feed section and sheet feed section exports outer side roller 45b The state of contact, and sheet feed section outlet inner roller 45a is carried out carrying out shift motion in the state of rotation driving.That is, can one Side will convey in the conveying direction with paper P, carry out shift motion on one side.

(variation)

Then, the variation of sheet feed section outlet driving mechanism 600 is illustrated.

It is the explanatory diagram of the sheet feed section outlet driving mechanism 600 of variation shown in Figure 13.It is that sheet feed section goes out shown in Figure 13 (a) Mouth roller exports inner roller 45a to 45 sheet feed section and sheet feed section exports the state of outer side roller 45b contact, is confession shown in Figure 13 (b) Paper portion exports inner roller 45a and sheet feed section exports the state of outer side roller 45b separation.

The sheet feed section outlet driving mechanism 600 of variation and the sheet feed section of Figure 12 illustrated embodiment export driving mechanism 600 similarly, and having can slide relative to 100 main body of printer on width direction (direction orthogonal with the paper in Fig. 2) Dynamic shift unit 60.The inside of shift unit 60 has sheet feed section outlet roller to abutting/separating mechanism 80, which includes supplying Paper portion exports inner roller 45a and sheet feed section exports outer side roller 45b, sheet feed section outlet roller to abutting/separation motor 451 and paper supply Portion's outlet roller is to drive motor 450.Then, composition sheet feed section outlet roller props up each component of abutting/separating mechanism 80 It holds, and is integrally slided relative to 100 main body of printer.

In addition, the rack tooth wheel portion 69 of driving when shift unit 60 includes input displacement.Then, with paper supply shown in Figure 13 Portion exports driving mechanism 600 similarly, the driving by sheet feed section outlet roller to shifting motor 452, and shifts driving output The rotation of gear 68, shift unit 60 just move on width direction (direction arrow " H " in Figure 13 (a)).

The sheet feed section outlet roller in the shift unit 60 of variation example is disposed on shown in Figure 14 to abutting/separating mechanism 80 Explanatory diagram.It is perspective illustration of the sheet feed section outlet roller to abutting/separating mechanism 80 shown in Figure 14 (a), is to cut shown in Figure 14 (b) Face explanatory diagram.It is all that sheet feed section outlet inner roller 45a and sheet feed section export outer side roller 45b contact shown in Figure 14 (a) and Figure 14 (b) When state.

Sheet feed section is exported outer side roller 45b and is supported to be exported with sheet feed section relative to abutting/release bearing component 67 It is rotated centered on outside roll shaft 63.Abutting/release bearing component 67 passes through the vectoring aircraft being arranged in the framework of shift unit 60 Structure, the framework relative to shift unit 60 are maintained as to be contacting and separating direction making sheet feed section export outer side roller 45b It is slided in (up and down direction in Figure 13).

Sheet feed section outlet roller includes and the framework of shift unit 60 and abuts/release bearing to abutting/separating mechanism 80 Component 67 is supported and is touched, and abutting/separation of abutting/release bearing component 67 towards sheet feed section outlet inner roller 45a force is compressed Spring 62.In the state for not acting on other external force in abutting/release bearing component 67, abutting/release bearing component 67 is logical Abutting/separation compressed spring 62 applied force is crossed to be exerted a force towards sheet feed section outlet inner roller 45a.Thereby, it is possible to rotatably by The sheet feed section being supported on abutting/release bearing component 67 exports outer side roller 45b and just abuts with sheet feed section outlet inner roller 45a ?.In the state that sheet feed section exports outer side roller 45b and abuts with sheet feed section outlet inner roller 45a, inside is exported by sheet feed section The rotation of roller 45a drives, and sheet feed section exports outer side roller 45b and makees driven rotation.

Sheet feed section outlet roller includes by sheet feed section outlet roller to abutting/separation motor 451 to abutting/separating mechanism 80 Driving is come the abutting/detaching cam rotary shaft 66 rotated and the abutting/separation being fixed in abutting/detaching cam rotary shaft 66 Cam 65.Additionally include the abutting/declutcher control lever rotary shaft 71 that can be rotated relative to the framework of shift unit 60, be fixed on to Connect/declutcher control lever rotary shaft 71 on and abutting/detaching cam push strut 70 for being pushed by abutting/detaching cam 65 and be fixed on Abutting/declutcher control lever 72 in abutting/declutcher control lever rotary shaft 71.

In Figure 14 (b), for convenience, the abutting/detaching cam for being more located at front side than illustrated section is represented by dashed line 65 and abutting/detaching cam push strut 70.

In the state that 2 rollers shown in Figure 13 (a) and Figure 14 are contact, elliptoid abutting/detaching cam 65 it is short Rim portion is contacted with abutting/detaching cam push strut 70.The state-driven sheet feed section outlet roller pair shown in Figure 13 (a) and Figure 14 When abutting/separation motor 451, abutting/detaching cam rotary shaft 66 and abutting/detaching cam 65 are along Figure 13 (a) and Figure 14 The direction arrow " I " rotates.By the rotation, the outer peripheral surface of elliptoid abutting/detaching cam 65 with abut/detaching cam push The distance of part to rotation center that bar 70 contacts is elongated, and 65 pairs of abuttings of abutting/detaching cam/detaching cam push strut 70 carries out It pushes.Then, abutting/detaching cam push strut 70 is centered on abutting/declutcher control lever rotary shaft 71 in Figure 13 (a) and Figure 14 It is rotated on the direction arrow " K ".At this point, abutting/declutcher control lever rotary shaft 71 and abutting/declutcher control lever 72 and abutting/detaching cam push Bar 70 together, only rotation with abut/detaching cam push strut 70 be identical rotation amount.

When the direction arrow " K " of abutting/declutcher control lever 72 in Figure 13 (a) and Figure 14 rotates, abutting/detaching cam is pushed Bar 70 exports outside roll shaft 63 with sheet feed section and contacts, and is applied by further rotating sheet feed section exporting outside roll shaft 63 The power above pushed away.As a result, sheet feed section outlet outside roll shaft 45b just with the applied force for abutting/separating compressed spring 62 it is mutually anti-scheming It is moved on direction arrow " L " in 13 (a) and Figure 14, as shown in Figure 13 (b), sheet feed section, which exports outer side roller 45b, just to be become from confession The state that outlet inner roller 45a in paper portion leaves.

The sheet feed section outlet driving mechanism 600 of variation, can be in sheet feed section outlet in the same manner as above embodiment Side roller 45a and sheet feed section carry out shift motion in the state of exporting outer side roller 45b separation.In addition it is possible to be exported in sheet feed section Inner roller 45a and sheet feed section export the state of outer side roller 45b contact, and carry out rotation driving to sheet feed section outlet inner roller 45a In the state of carry out shift motion.That is, will can be conveyed in the conveying direction with paper P on one side, shift motion is carried out on one side.

Contraposition roller to 18 and sheet feed section outlet roller to 45 similarly and the shift roller pair that can be contacting and separating of 2 rollers. Therefore, as make align roller to 18 rotation driving, displacement and separated contraposition driving mechanism, be able to use with shown in Figure 12 The sheet feed section of variation shown in the sheet feed section outlet driving mechanism 600 or Figure 13 and Figure 14 of embodiment exports driving mechanism 600 are constituted to be same.

It in the above-described embodiment, is to carry out 2 groups of shift rollers of shift motion to being contraposition roller to 18 Hes with paper P to clipping The case where sheet feed section outlet roller is to 45 are illustrated, and but it is not limited to this.As 2 groups of shift rollers pair, as long as 2 groups of conveying rollers Pair combination, such as be also possible to align roller and 18 and relaying roller clipped to 43 and carry out the composition of shift motion with paper P.But It is, when the distance with 2 groups of shift rollers pair in paper transport path 19 is shorter, under paper P in the conveying direction longer situation, It can be possible to generating deflection on paper P in shift motion as shown in Figure 6 illustrates.Therefore, even by 2 groups of shiftings Position roller when carrying out shift motion, will not preferably generate the paper P for clipping the maximum length that can be conveyed on paper P 2 groups of conveying roller pairs of the position of deflection are as shift roller pair.

What is illustrated in the above-described embodiment is to clamp the clamping transfer unit pair that transfer unit clips sheet material displacement by 2 The shift roller pair formed by 2 roller components, but the clamping transfer unit for forming clamping transfer unit pair is not limited to 2 rollers Component.For example, it can be clamping the composition of sheet material each other by tape member, or by tape member and roller member come clamping piece The composition of material.

In addition, as clamping transfer unit pair, however it is not limited to which the both sides for clamping 2 clamping transfer units of sheet material are rollers The composition of the surface moving body of component or tape member etc..As long as clamping 2 clamping transfer units of sheet material in application pressure At least one of be surface moving body, and it is mobile come feeding sheets by surface.For example, being conveyed as 2 clampings Component is also possible to the plate component not moved as the roller member of surface moving body and surface, in the state for clipping sheet material Under by rotation roller member to the sheet material clipped give conveying capacity, and sheet material is defeated while with plate component sliding friction The composition sent.

(second embodiment)

It in the above-described embodiment, is that sheet material conveyor according to the present invention is applied to as image forming apparatus Printer 100 paper delivery section in.Hereinafter, sheet material according to the present invention is conveyed and is filled as second embodiment It sets and is suitable for being illustrated for auto document feeder.

It is as the image forming apparatus with auto document feeder involved in second embodiment shown in Figure 15 Duplicator 500 schematic configuration diagram.

Duplicator 500 is that the top of printer 100 shown in Fig. 2 is configured with the composition of image read-out 400.Image is read Take device 400 that there is the ADF8 as auto document feeder and the scanner 9 as image reading mechanism.

Printer 100 possessed by duplicator 500 in the same manner as the printer 100 of above embodiment, can according to from The image information of input terminal or operation panel 3 input of personal computer etc. is formed on paper P.Further, Printer 100 possessed by duplicator 500 can form image on paper P according to image read-out 400.

It is the schematic configuration diagram of image read-out 400 shown in Figure 16.

The composition of image read-out 400 is to allow hand over to sweep for flat-bed scanning mode (mounting original copy read mode) and DF Retouch mode (conveying original copy read mode).

Flat-bed scanning mode is led in the state of being placed with original copy on the board joint contact glass 113 on the top of scanner 9 Cross press copy start button etc. reading start require operation, come execute read mounting original image action mode.Flat While making image reading unit 116 mobile in mobile reading area 111 immediately below plate contact glass 113, to the figure of original copy Image planes irradiation light.Then, the image of original copy is read by the way that the reflected light of the image surface of the original copy is transformed to picture signal.

DF scan pattern is the stopping reading area 112 for stopping at image reading unit 116 immediately below DF contact glass 114 To read the action mode of conveying original image.

ADF8 under DF scan pattern, by original copy sheet material from be loaded in original copy mounting disk 121 (original copy mounting table) on original Original text sheet bundle is transported in original copy transport path 122 after separating one by one, and is conveyed along original copy transport path 122.Then, exist In the conveying, original copy sheet material can be successively opposite and right with the upper surface of DF contact glass 114 from the upstream part of conveying direction.

ADF8 is the hinge etc. by means of the rear portion (part of the back side in Figure 15 and Figure 16) of the upper surface of scanner 9 side Switching mechanism is installed.In addition, ADF8 can enter it is open to being carried out on board joint contact glass 113 relative to scanner 9 Open position, and the closed position of the original copy on board joint contact glass 113 can be pressed.

As long as image reading unit 116 is by CCD module or cis module etc., in defined image reading position to original copy Surface side image carry out repeatedly line scanning can read.Stopping reading being fixed on alternatively, it is also possible to be respectively set Fixation image reading unit in region 112, and moved in mobile reading area 111 along what board joint contact glass 113 moved Reading part.

The movable flipper guide 123 in left and right is installed on original copy mounting disk 121, in the sheet material orthogonal with the paper supply direction The original copy sheet material being placed on ADF8 is positioned in width direction.These flipper guides 123 can be relatively close to and separate, with Keep original copy mounting disk 121 consistent with the center of the width direction of original copy sheet material.But flipper guide 123 is also possible to make original copy piece The edge part of one side of material is abutted with the edge part side of a side of original copy mounting disk 121, only makes the edge part one of another party Side can move.

ADF8 can be at least opened and closed the cover 138 above it to cover.Further, the original copy conveying of ADF8 is formed The main leader in path 122 is by formation such as the ribs that is formed in the cover 138.On the other hand, ADF8, which has, incites somebody to action The calling roller 124 that the original copy being placed on original copy mounting disk 121 is called towards paper supply direction, and for calling roller will to be passed through The feed rolls 125 and separating pad 143 that 124 original copys being called on paper supply direction are transmitted towards original copy transport path 12.

ADF8 have delivery section 127, by by feed rolls 125 by paper supply to the original copy in original copy transport path 122 The posture for carrying out image reading on glass 114 can be contacted to convey in DF, and the original copy after image reading is delivered to row Outlet 136.

The delivery section 127 is by the original copy sheet material for being separated, being moved in by feed rolls 125 equal along 122 folding of original copy transport path Ground return is come while reversion, to convey original copy sheet material to contact the defined reading position of the upper surface of glass 114 by DF.For Carry out this original copy conveying, be the DF contact glass 114 among original copy transport path 122 upstream side in be provided with first Conveying roller pair 128, the second conveying roller pair 129 and the original copy contraposition detected to the front end of the conveying direction of original copy sheet material pass Sensor 131.In addition, the upstream side of the first conveying roller pair 128 among original copy transport path 122 is also provided with to original copy sheet material Bump sensor 154 is supported by what the separation clamping part formed by feed rolls 125 and separating pad 143 was detected.

ADF8 has according to the testing result of each sensor come calling roller 124 shown in the arrow " γ " in control figure 16 It shakes or the original copy of the driving of each roller conveys control unit 7.

It is conveyed by the equal isolated original copy sheet material of feed rolls 125 by the first conveying roller pair 128 and the second conveying roller pair 129 To be contacted above glass 114 by DF.Then, the front-end detection opportunity of the original copy sheet material of level sensor 131 is led to according to original copy Image reading unit 116 is crossed in time to read original copy surface image.

For example, passing through the original copy as driving source when the front end of original copy sheet material detects level sensor 131 by original copy The front position of the step-by-step counting of paper supply motor and original copy sheet material that can be detected reaches the reading position on DF contact glass 114 Opportunity be assured that.Since the gate-control signal for indicating effective image-region on the sub-scanning direction on the surface of original copy sheet material It sends, until the back-end location of the original copy sheet material passes through reading position, gate-control signal can continue to send.

When requiring to read the back side image of original copy sheet material, back side image passes through the close-connected image biography by back side reading The back side image read module 135 (the second image reading unit) that sensor is constituted is read.

Back side image read module 135 has the light source for lighting direction of signal original copy sheet material irradiation light according to control unit Portion, the multiple sensor chip for receiving the reflected light from original copy sheet material and the signal progress to the output of each sensor chip Multiple enlarging sections of amplification.Back side image read module 135, which also has, turns the signal from analog signal amplified by enlarging section It is changed to the A/D converter section of digital signal, and the image processing part to the signal real-time image processing after number conversion.

Further, which also has according to the timing signals of control unit come to being stored in Signal in frame memory carries out the output control circuit of output control, and the signal of output control circuit is output to printer The interface circuit etc. of 100 sides.The image reading on opportunity and surface side that the back side image of the back side image read module 135 is read Opportunity is controlled substantially in the same manner, and the original copy after reading is discharged on original copy discharge tray 139.

The downstream side of DF contact glass 114 in original copy transport path 122, equipped with completing the image reading of surface side The original copy reading outlet roller 132 that rearwardly 135 side of image reading module conveys.Then, in the downstream side point for reading outlet roller 132 The white guide member 133 of back side image read module 135 She Zhi be faced, and is located at back side image read module 135 and white The original copy exit roller 137 in the downstream side of color guide member 133.

White guide member 133 has the guiding function for moving conveying original copy along back side image read module 135, together When also have in overleaf image reading module 135 with main scanning direction whole region come the shading correction that opposite configures White reference face.

In ADF8, the first conveying roller pair 128 and the second conveying roller pair 129 are to clip the state of original copy sheet material in sheet material Movement carrys out the shift roller pair so that the displacement in the sheet width direction of original copy sheet material in width direction.In addition, detection original copy The original copy of the front end of the conveying direction of sheet material is to be able to detect original copy sheet material to reach detection position and arrival to level sensor 131 The sensor of the position of the width direction of original copy sheet material afterwards.

When original copy detects the position of the end in the sheet width direction of the next original copy sheet material of conveying to level sensor 131 When, control unit 7 is just conveyed by original copy to calculate the correction amount of the width direction of original copy sheet material.Then, according to calculated correction Amount, by carrying out so that the displacement that the first conveying roller pair 128 and the second conveying roller pair 129 move on sheet width direction is moved Make, come the position in the sheet width direction for the original copy sheet material that makes corrections.

When original copy sheet material is placed on original copy mounting disk 121 by user, it is easy to happen the sheet width of original copy sheet material The positional shift in direction.If it is shift motion is carried out the ADF8 such as second embodiment, to the sheet material of original copy sheet material The composition that the position deviation of width direction makes corrections, it will be able to mitigate original copy mounting disk 121 on load original copy sheet material when pair The mounting precision of original copy sheet material required by user.

When the front end of original copy sheet material passes through detection position of the original copy to level sensor 131, original copy conveys control unit 7 and carries out Make feed rolls 125 and the isolated control of separating pad 143.Using the first conveying roller pair 128 and the second conveying roller pair 129 as a result, When carrying out shift motion, can prevent separation clamping part positioned at 129 upstream of the first conveying roller pair 128 and the second conveying roller pair at For the obstacle of the displacement of original copy sheet material.

After separating feed rolls 125 and separating pad 143, original copy conveying control unit 7 is respectively driven so that the first conveying roller To the driving mechanism of 128 displacements, and the driving mechanism for shifting the second conveying roller pair 129.Just passing through the first conveying as a result, Roller to 128 and second conveying roller pair 129 clip original copy sheet material in the state of so that the first conveying roller pair 128 and the second conveying roller It is synchronously displaced to 129.Only come with the amount of the correction amount in calculated sheet width direction so that original copy sheet material is in sheet material After the completion of the shift motion moved in width direction, with regard to driving the driving mechanism being separate to the first conveying roller pair 128, Come so that the outer conveying of the side roller 128b and first inner roller 128a separation of the first conveying.Later, only by the second conveying roller pair 129 come Convey original copy sheet material.

So that driving the driving mechanism so that the displacement of the first conveying roller pair 128, and will after the separation of the first conveying roller pair 128 The position in the sheet width direction of the first conveying roller pair 128 returns to the initial bit as the position before above-mentioned shift motion In setting.When the position in the sheet width direction of the first conveying roller pair 128 becomes initial position, and the rear end of original copy sheet material passes through the As soon as when the position of conveying roller pair 128, driving carrys out the driving mechanism that the first conveying roller pair 128 is contacting and separating so that the 2 rollers of one conveying roller pair 128 contact.

In ADF8, the original copy sheet material of conveying is more defeated than the original copy until first the 128 to the second conveying roller pair of conveying roller pair 129 In the case where sending the distance in path 122 to want short, it is also possible to shift the second conveying roller pair 129 on sheet width direction Composition.

On the other hand, the original copy sheet material of conveying is more defeated than the original copy until first the 128 to the second conveying roller pair of conveying roller pair 129 In the case where sending the distance in path 122 to grow, original copy is just clamped by the first conveying roller pair 128 and the second conveying roller pair 129 Sheet material, and make this 2 groups of rollers to moving in the direction of the width.By then passing through the first conveying roller pair 128 and the second conveying roller pair 129 clip original copy sheet material to shift, such that inhibit in shift motion to the rotating torques of original copy sheet material effect, and It is able to suppress the generation because of shift motion and the deflection in sheet material.

Further, after the shift motion of the first conveying roller pair 128 and the second conveying roller pair 129, the first conveying Roller is separated from each other to 128 roller, and only conveys original copy sheet material by the second conveying roller pair 129.At this point, after original copy sheet material Before the clip position that end passes through the first conveying roller pair 128, so that 2 rollers of the first conveying roller pair 128 separate.Energy as a result, Enough original copy sheet material is inhibited (original copy sheet material to be made to incline relative to conveying direction by deflection ingredient possessed by the first conveying roller pair 128 Oblique power) influence.Therefore, it will be able to inhibit inclination of the original copy sheet material to sheet material conveying direction, so as to realize original copy piece The raising of the delivery precision of material.

In addition, original copy sheet material connects in the DF with the image for reading original copy sheet material by the delivery precision for improving original copy sheet material Contact glass 114 or back side image read module 135 it is opposite and pair position at position precision will improve.Thereby, it is possible to press down The position deviation of reading image of the imaged reading device 400 when reading the image of original copy sheet material, reads so as to realize The raising of the precision of obtained image information.

The precision that obtained image information is read by improving image read-out 400, can be realized and be formed in duplicator 500 printer 100 is formed by the precision of images with the image on paper P, so as to realize the raising pair in duplicator 500 The performance that original copy is duplicated.

" sheet material " that sheet material conveyor according to the present invention is conveyed include paper, coated paper, OHP sheet material, label paper, Film, cloth and silk etc..Further, " sheet material " further includes resin sheet, the protection sheet of surface back side, metal sheet, copper foil etc. Metal foil and plating treated electronic printing circuit board material, Special Film, plastic film, prepreg, electronic printing electricity Road plate sheet material etc..Prepreg is the pre-soaked material of the sheet of resin in carbon fiber etc..The example of prepreg Including by the way that the additives such as curing agent, colorant are added in fibre reinforced materials such as carbon fiber or glass fabric And the thermosetting resin formed, and be heated or dry to form the reinforced plastics mold member of the sheet of semi-cured state Material.

In addition, sheet material conveyor according to the present invention is the device of feeding sheets shape component, can all be suitable for Need the device for preventing sheet component relative to the inclined deflection of conveying direction.For example, being equally applicable to working sheet shape component Processing unit (plant).

In addition, " image forming apparatus " of the composition with sheet material conveyor is included in paper, OHP sheet material, silk thread, fibre Progress image is formed after adhering to developer or ink on the medium of dimension, cloth and silk, leather, metal, plastics, glass, timber, ceramics etc. Device.In addition, " image is formed " is not only there is the image of the expression meaning to be imparted on medium text or figure etc., also wrap The image by pattern pattern etc. without the expression meaning is included to be imparted on medium.

Above explanation is an example, and various modes below all have distinctive effect.

(mode 1)

It can clip with 2 groups with the conveying of the sheet materials such as paper P and the confession mobile to the width direction being transversely to the conveying direction The outlet roller sheet material conveying equal to the sheet material conveyor 300 of 18 etc. clamping transfer member pair to 45 and contraposition roller in paper portion fills It sets, it is characterised in that: it is mobile to width direction to the state of a sheet material is clipped with 2 groups of clamping transfer members, and towards width After spending direction movement, it is located at the sheet feed section outlet roller pair of conveying direction upstream side so that being formed among 2 groups of clamping transfer members pair (sheet feed section exports inner roller 45a to 2 clamping transfer members of 45 equal upstream side clamping transfer members pair and sheet feed section outlet is outer Side roller axis 45b) separation, and by being located at the contraposition roller of conveyance direction downstream side among 2 groups of clamping transfer members pair to 18 etc. Downstream side clamps transfer member to carrying out feeding sheets.

As a result, as the explanation done to above embodiment, with 2 groups of clamping transfer units to clamping sheet material Behind the position in adjustment width direction, it is able to suppress inclination of the sheet material relative to conveying direction.Its reason is as follows.

That is, clipping sheet material with 2 components come the clamping transfer unit of the conveying roller equity conveyed to generally can be because of part The meeting such as error or assembly error is so that the sheet material in conveying occurs and the inclined power of conveying direction.Therefore, it is conveyed with 2 groups of clampings After component is to sheet material progress shift motion is clipped, conveying sheet is being come to the state for continuing to clip sheet material with 2 groups of clamping transfer units When material, 2 groups of clamping transfer units are to being applied to the inclined power of sheet material will on sheet material.

In mode 1, clamp upstream side clamping transfer unit to separation, and by downstream side Transfer unit is to carrying out feeding sheets.Therefore, it will be able to inhibit 2 groups of clamping transfer units to make it is in the inclined power of sheet material, on Clamping transfer unit in trip side is to making effect of the inclined power of sheet material to sheet material.Therefore, with 2 groups of folders are continued through after shift motion It holds transfer unit to compare the composition for carrying out feeding sheets, is able to suppress sheet material and tilts in the conveying direction.

(mode 2)

On the basis of mode 1, which is characterized in that after by 2 components separation of upstream side clamping transfer unit pair, In the rear end of sheet material by starting that upstream side is made to clamp transfer unit before clamping transfer unit to the position of clamping by upstream side Movement to initial position is returned to.

As a result, as the explanation for doing above embodiment, begin to return before by the rear end of sheet material Return to the movement in initial position, it will be able to start the width direction of the clamping of the upstream side after shifting transfer unit pair as early as possible Position returns to the movement in initial position.Therefore, it will be able to shorten the time until receiving next sheet material.

(mode 3)

On the basis of mode 1 or 2, it is characterised in that: be equipped with detection lug near downstream side clamping transfer unit pair The width position detection sensor 46 of the width position of material, and according to the detection knot of width position testing agency Fruit, come calculate 2 groups of clamping transfer members pair when shift motion width direction amount of movement.

As a result, as the explanation done to above embodiment, can calculate according to will carry out shift motion it The correction amount of the position of preceding sheet material, so as to the position for the sheet material that suitably makes corrections.

(mode 4)

Either in mode 1 to 3 on the basis of formula, it is characterised in that: clamp transfer member in delivery ratio upstream side When the sheet material of the distance of the transport path equal to the paper transport path 19 until downstream side clamps transfer member pair, be with 2 groups of clamping transfer members carry out so that 2 groups of clamping transfer member opposite direction width directions movements, are conveying the state for clipping sheet material When than the upstream side clamping transfer member sheet material short to the distance of the transport path until downstream side clamps transfer member pair, it is With downstream side clamping transfer member to the state for clipping sheet material, move downstream side clamping transfer member opposite direction width direction It is dynamic.

As a result, as the explanation done to above embodiment, in the case where the sheet material of conveying is shorter, upstream side Clamping transfer unit is kept in contact or close state to becoming 2 clamping transfer units in initial position, so as to contract It is as short as receiving the time until next sheet material.

(mode 5)

Either in mode 1 to 4 on the basis of formula, it is characterised in that: in the defeated of upstream side clamping transfer member pair Direction upstream side is sent to be equipped with the upstream side sheet material testing agency that the rear end detection sensor 47 detected to the presence or absence of sheet material waits, And the testing result of upstream side sheet material testing agency when according to sheet material arrival downstream side sheet material moving body, judge conveyed piece The length of material whether be greater than upstream side clamping transfer member to transport path until downstream side clamps transfer member pair away from From.

As a result, as the explanation done to above embodiment, it can be realized the length according to sheet material and make upstream The control that side clamps transfer unit pair is different compositions.

(mode 6)

Either in mode 1 to 4 on the basis of formula, it is characterised in that: according to the defeated of the sheet material of paper feed 200 etc. The information (with the dimension information etc. of paper P) for the sheet material that the sheet material receiving portion for sending the sheet feed stacker 5 in source equal is accommodated, what judgement was conveyed Whether the length of sheet material is greater than upstream side clamping transfer member to the transport path until downstream side clamps transfer member pair Distance.

(mode 7)

The image forming apparatus of a kind of printer 100 etc., it is characterised in that including on the sheet material of the paper P conveyed etc. The image formation mechanism for forming imaging unit 2 and intermediate transfer belt 16 and secondary transfer roller 15 of image etc., as feeding sheets Composition, the composition with sheet material conveyor involved in either type in mode 1 to 6.

As a result, as the explanation done to above embodiment, it is able to suppress the position for the image being formed on sheet material Deviation is set, and can be realized the raising of the precision of images for the image being formed on sheet material.

(mode 8)

The auto document feeder of ADF8 etc. a kind of, the image reading equal towards the scanner 9 for reading original copy sheet material Mechanism conveys original copy sheet material, it is characterised in that structure including sheet material conveyor involved in any of mode 1 to 6 mode At.

As a result, as illustrated by above-mentioned second embodiment, by the first conveying roller pair 128 and the second conveying roller pair 129 equal 2 groups of clamping transfer units are able to suppress original copy sheet material phase to clipping after original copy sheet material comes the position in adjustment width direction Inclination for conveying direction.Thereby, it is possible to realize the raising of the delivery precision of original copy sheet material.

(mode 9)

A kind of image read-out of image read-out 400 etc. comprising the original copy conveying mechanism of conveying original copy sheet material, The image reading mechanism that the scanner 9 being read out with the image on the original copy sheet material next to the conveying of original copy conveying mechanism waits, It is characterized in that: as original copy conveying mechanism, the auto document feeder with ADF8 described in mode 8 etc..

As a result, as illustrated by above-mentioned second embodiment, it is able to suppress the reading when image for reading original copy sheet material Take the position deviation of image, so as to realize image information that reading obtains precision raising.

(mode 10)

A kind of image forming apparatus of duplicator 500 etc. comprising image reading mechanism, and read according to image reading mechanism The image information taken forms the image formation mechanism of image printer 100 etc., it is characterised in that: as image reading machine Structure, the image read-out including image read-out 400 described in mode 9 etc..

As a result, as can be realized according to the image of original copy sheet material and shape to as illustrated by above-mentioned second embodiment At image the precision of images raising.

Claims

1. a kind of can clip sheet material conveying and the clamping conveying mobile to the width direction being transversely to the conveying direction with 2 groups The sheet material conveyor of component pair, it is characterised in that:

It is mobile to the width direction to the state of a sheet material is clipped with clamping transfer member described in 2 groups, and towards After the width direction is mobile, so that being located at the conveying direction upstream side among clamping transfer member pair described in forming 2 groups Upstream side clamps 2 clamping transfer member separation of transfer member pair, and by clamping among transfer member pair described in 2 groups Downstream side clamping transfer member positioned at the conveyance direction downstream side is to conveying the sheet material.

2. sheet material conveyor according to claim 1, it is characterised in that:

It is after through the sheet material after the clamping transfer member separation of 2 of the upstream side clamping transfer member pair End is sandwiched into before the position of the upstream side clamping transfer member pair, starts the institute that the upstream side is clamped to transfer member pair The position for stating width direction returns to the movement of initial position.

3. sheet material conveyor according to claim 1 or 2, it is characterised in that:

The width for detecting the width position of the sheet material is equipped near downstream side clamping transfer member pair Direction position detecting mechanism, and according to the testing result of the width position testing agency, to calculate towards the width The amount of movement of transfer member pair is clamped described in 2 groups when direction is mobile.

4. sheet material conveyor described in any one of claim 1 to 3, it is characterised in that:

The upstream side described in delivery ratio clamps transfer member to the transport path until the downstream side clamps transfer member pair Distance the sheet material when, be with described in 2 groups clamping transfer member to the state for clipping the sheet material, come so that 2 groups of institutes It is mobile to state the opposite width direction of clamping transfer member,

The upstream side described in delivery ratio clamps transfer member to the transport path until the downstream side clamps transfer member pair The distance short sheet material when, be that institute is only made to the state for clipping the sheet material with downstream side clamping transfer member It is mobile to state the downstream side opposite width direction of clamping transfer member.

5. sheet material conveyor according to any one of claim 1 to 4, it is characterised in that:

It is equipped in the conveying direction upstream side of upstream side clamping transfer member pair and the presence or absence of described sheet material is examined The upstream side sheet material testing agency of survey, and the upstream that the downstream side clamps transfer member clock synchronization is reached according to the sheet material The testing result of lateral plate material testing agency, judges whether the length of the sheet material conveyed is greater than the upstream side clamping conveying Distance of the component to the transport path until the downstream side clamps transfer member pair.

6. sheet material conveyor according to any one of claim 1 to 4, it is characterised in that:

According to the information for the sheet material that the sheet material receiving portion of the delivery source of the sheet material is accommodated, described conveyed is judged Whether the length of material is greater than the upstream side clamping transfer member to the conveying until the downstream side clamps transfer member pair The distance in path.

7. a kind of image forming apparatus, has the image formation mechanism for forming image on transported sheet material, feature exists In:

As the composition for conveying the sheet material, the composition with sheet material conveyor according to any one of claims 1 to 6.

8. a kind of auto document feeder conveys the original copy piece towards the image reading mechanism for reading original copy sheet material Material, it is characterised in that:

Composition including sheet material conveyor described in any one of claims 1 to 6.

9. a kind of image read-out comprising the original copy conveying mechanism of conveying original copy sheet material, and to the original copy conveying mechanism The image reading mechanism that the image on original copy sheet material that conveying comes is read out, it is characterised in that:

As the original copy conveying mechanism, there is auto document feeder according to any one of claims 8.

10. a kind of image forming apparatus comprising image reading mechanism, and believed according to the image that described image reading mechanism is read It ceases to form the image formation mechanism of image, it is characterised in that:

As described image reading mechanism, including image read-out as claimed in claim 9.